Problem:

Input: root = [1,null,2,3]
Output: [1,3,2]
Input: root = []
Output: []

Problem:

Input: head = [1,1,2]
Output…


Problem:


Problem:


Problem:


Problem:


Problem:


Problem:

Input: l1 = [1,2,4]…


Problem:

  1. Open brackets must be closed by the…


Problem:

Input: strs = ["flower","flow","flight"]
Output: "fl"

Rishikesh Dhokare

I am a Software Engineer from India and working in Berlin, Germany. I write about technology, my experiences in Germany, travel in Europe.

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